Electrographic recording material
AssigneeAgfa-Gevaert
InventorsRobert Joseph Noe, Pierre Jean Rutten
Life of this patent
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Abstract
A non-photoconductive insulating layer for use in an electrographic recording material comprises a copolymer of 50 to 91 % by weight of vinyl acetate, 8 to 50 % by weight of a vinyl ester of a fatty acid of 12 to 18 carbon atoms, and 0 to 2 % by weight of crotonic acid.
Claims13
An electrographic recording material comprising a conductive sheet support having a surface resistivity not exceeding about 1 .times. 10.sup.10 ohm/sq. and carried on said support a non-photoconductive insulating layer consisting essentially of about 2-20 gms dry weight per sq.m. of a copolymer of about 50-91% by weight of vinyl acetate, about 8-50% by weight of a vinyl ester of a C.sub.12-18 fatty acid, and about 0-2% by weight of crotonic acid, and up to 400% by weight of said copolymer of a finely divided non-photoconductive pigment.
In an electrographic recording method in which an electrostatic charge pattern is formed on an electrically insulating non-photoconductive layer, the improvement wherein said insulating layer consists essentially of a copolymer of about 50-91% by weight of vinyl acetate, about 8-50% by weight of a vinyl ester of a C.sub.12-18 fatty acid, and about 0-2% by weight of crotonic acid, and up to 400% by weight of said copolymer of a finely divided non-photoconductive pigment.
Dependencies are inferred from the claim text.